Can I get help with one and two

The average daily maximum temperature for laura’s hometown can be modeled by the function f(x)=4.5sin(πx/6)+11.8 , where f(x) is the temperature in °c and x is the month. x = 0 corresponds to january. what is the average daily maximum temperature in may? round to the nearest tenth of a degree if needed. use 3.14 for π .

Which term describes the point where the perpendicular bisectors of the three sides of a triangle intersect?

Find the measure of angle b in the following triangle